There are 12 words that start with 'excita'.
| excitant | excitable | 
| excitably | excitants | 
| excitation | excitative | 
| excitatory | excitations | 
| excitability | excitableness | 
| excitabilities | excitablenesses | 
Note: These 12 words that start with 'excita' are found from the USA & Canada version of the tournament Scrabble word list.